Embibe Experts Solutions for Exercise 2: Assignment Set-2

The change in the oxidation state of Mn from permanganate ion to the product obtained from its reaction in faintly alkaline medium is

The equilibrium $2{\mathrm{CrO}}_4^{2-}\rightleftharpoons C{r}_2{\mathrm{O}}_7^{2-}$ shifts to the right in

In dichromate ion

The correct match of the order of the ions/elements for the given properties is/are
(i) ${\mathrm{Mn}}^{2+}<{\mathrm{Fe}}^{2+}<{\mathrm{Co}}^{2+}<{\mathrm{Ni}}^{2+}-$ Magnitude of hydration enthalpy
(ii) $\mathrm{Co}>\mathrm{Ni}>\mathrm{Fe}>\mathrm{Mn}-$ Atomic radii
(iii) ${\mathrm{Ni}}^{2+}<{\mathrm{Co}}^{2+}<{\mathrm{Fe}}^{2+}<{\mathrm{Mn}}^{2+}-$ Number of unpaired electrons

The coloured product obtained on reaction of ferrous chromate with sodium carbonate in free access of air is

The transition metals form a large number of complex compounds due to

Among lanthanoids, the basic nature of hydroxides gradually

Consider the following statements.
(i) $\mathrm{Zr}$ and $\mathrm{Hf}$ have almost identical radii
(ii) ${\mathrm{Ce}}^{4+}$ is a strong reductant
(iii) $\mathrm{Ln}$ (lanthanoids) combine with nitrogen and form ${\mathrm{LnN}}_3$
The correct statement(s) is/are